161 lines
5.5 KiB
Bash
161 lines
5.5 KiB
Bash
#!/bin/sh
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#
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# Run this script as root on the machine that has the tape drive, to make a
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# level-1 dump containing all files changed since the last full dump.
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#
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# If you give `now' as an argument, the dump is done immediately.
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# Otherwise, it waits until 1am.
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#
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# You must edit the file `backup-specs' to set the parameters for your site.
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if [ ! -w / ]; then
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echo The backup must be run as root,
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echo or else some files will fail to be dumped.
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exit 1
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else
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false
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fi
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# Get the values of BACKUP_DIRS and BACKUP_FILES, and other variables.
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. ./backup-specs
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# Maybe sleep until around specified or default hour.
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#
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if [ "${1}" != "now" ]; then
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if [ "${1}"x != x ]; then
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spec=${1}
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else
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spec=${BACKUP_HOUR}
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fi
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pausetime=`date | awk '{hr=substr($4,1,2);\\
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mn=substr($4,4,2);\\
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if((hr+0)<spec+0)\\
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print 3600*(spec-hr)-60*mn;\\
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else\\
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print 3600*(spec+(24-hr))-60*mn; }' spec=$spec`
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clear
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cat ./dont_touch
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sleep ${pausetime}
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fi
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# start doing things
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here=`pwd`
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LOGFILE=log-`date | awk '{print $2 "-" $3 "-" $6}'`-level-1
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HOST=`hostname | sed 's/\..*//'`
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TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
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# Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
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if [ x != "x${DUMP_REMIND_SCRIPT}" ]; then
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TAR_PART1="${TAR_PART1} --info-script=${DUMP_REMIND_SCRIPT}"
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fi
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# Make sure the log file did not already exist. Create it.
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if [ -f ${LOGFILE} ] ; then
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echo Log file ${LOGFILE} already exists.
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exit 1
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else
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touch ${LOGFILE}
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fi
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mt -f ${TAPE_FILE} rewind
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rm ${VOLNO_FILE}
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set ${BACKUP_DIRS}
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while [ $# -ne 0 ] ; do
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host=`echo ${1} | sed 's/:.*$//'`
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fs=`echo ${1} | sed 's/^.*://'`
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date=`date`
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fsname=`echo ${1} | sed 's/\//:/g'`
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# This filename must be absolute; it is opened on the machine that runs tar.
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TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
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TAR_PART3="--label='level 1 backup of ${fs} on ${host} at ${date}' -C ${fs} ."
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echo Backing up ${1} at ${date} | tee -a ${LOGFILE}
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echo Last full dump on this filesystem: | tee -a ${LOGFILE}
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if [ ${HOST} != ${host} ] ; then
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rsh ${host} "ls -l /etc/tar-backup/${fsname}.level-0; \
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cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1" \
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2>&1 | tee -a ${LOGFILE}
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else
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ls -l /etc/tar-backup/${fsname}.level-0 2>&1 | tee -a ${LOGFILE}
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cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
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fi
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# Actually back things up.
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if [ ${HOST} != ${host} ] ; then
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rsh ${host} ${TAR_PART1} -f ${HOST}:${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} 2>&1 | tee -a ${LOGFILE}
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else
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# Using `sh -c exec' causes nested quoting and shell substitution
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# to be handled here in the same way rsh handles it.
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sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3}" 2>&1 | tee -a ${LOGFILE}
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fi
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# This doesn't presently work, of course, because $? is set to the exit
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# status of the last thing in the pipeline of the previous command,
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# namely `tee'. We really want the exit status of the sh command
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# running tar, but getting this seems to be nontrivial. --friedman
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if [ $? -ne 0 ] ; then
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echo Backup of ${1} failed. | tee -a ${LOGFILE}
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# I'm assuming that the tar will have written an empty
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# file to the tape, otherwise I should do a cat here.
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else
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if [ ${HOST} != ${host} ] ; then
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rsh ${host} mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 | tee -a ${LOGFILE}
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else
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mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 | tee -a ${LOGFILE}
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fi
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fi
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${TAPE_STATUS} | tee -a ${LOGFILE}
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sleep 60
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shift
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done
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# Dump any individual files requested.
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if [ x != "x${BACKUP_FILES}" ] ; then
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date=`date`
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TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
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TAR_PART3="--label='Incremental backup of miscellaneous files at ${date}'"
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echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
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echo Last full dump of these files: | tee -a ${LOGFILE}
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ls -l /etc/tar-backup/misc.level-0 2>&1 | tee -a ${LOGFILE}
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rm -f /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
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cp /etc/tar-backup/misc.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
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echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
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# Using `sh -c exec' causes nested quoting and shell substitution
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# to be handled here in the same way rsh handles it.
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sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} \
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${BACKUP_FILES}" 2>&1 | tee -a ${LOGFILE}
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# This doesn't presently work, of course, because $? is set to the exit
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# status of the last thing in the pipeline of the previous command,
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# namely `tee'. We really want the exit status of the sh command
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# running tar, but getting this seems to be nontrivial. --friedman
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if [ $? -ne 0 ] ; then
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echo Backup of miscellaneous files failed. | tee -a ${LOGFILE}
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# I'm assuming that the tar will have written an empty
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# file to the tape, otherwise I should do a cat here.
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else
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mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/misc.level-1 2>&1 | tee -a ${LOGFILE}
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fi
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${TAPE_STATUS} | tee -a ${LOGFILE}
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else
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echo No miscellaneous files specified | tee -a ${LOGFILE}
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false
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fi
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mt -f ${TAPE_FILE} rewind
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mt -f ${TAPE_FILE} offl
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echo Sending the dump log to ${ADMINISTRATOR}
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cat ${LOGFILE} | sed -f logfile.sed > ${LOGFILE}.tmp
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/usr/ucb/mail -s "Results of backup on `date`" ${ADMINISTRATOR} < ${LOGFILE}.tmp
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rm -f ${LOGFILE}.tmp
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